{"id":75487,"date":"2025-06-04T11:45:58","date_gmt":"2025-06-04T11:45:58","guid":{"rendered":"https:\/\/www.sardinasystems.com\/sem-categoria\/o-que-necessita-saber-sobre-codificacao-de-eliminacao-para-tomar-a-decisao-correta-sobre-armazenamento\/"},"modified":"2025-06-04T16:11:48","modified_gmt":"2025-06-04T16:11:48","slug":"what-you-need-to-know-about-erasure-coding-to-make-the-right-storage-choice","status":"publish","type":"post","link":"https:\/\/www.sardinasystems.com\/pt-pt\/o-nosso-blog\/what-you-need-to-know-about-erasure-coding-to-make-the-right-storage-choice\/","title":{"rendered":"O que necessita saber sobre codifica\u00e7\u00e3o de elimina\u00e7\u00e3o para tomar a decis\u00e3o correta sobre armazenamento"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\" style=\"font-size:18px\"><em>Na era dos grandes dados, as empresas est\u00e3o a gerar mais informa\u00e7\u00e3o do que nunca. Contudo, n\u00e3o \u00e9 suficiente apenas armazenar dados\u2014estes devem ser armazenados de forma eficiente, fi\u00e1vel e econ\u00f3mica. \u00c9 aqui que a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o (CE) entra em jogo. Utilizada por sistemas de armazenamento distribu\u00eddo <a href=\"https:\/\/ceph.io\/en\/\" target=\"_blank\" rel=\"noopener\" title=\"\">como o Ceph<\/a>, a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o oferece uma forma mais inteligente de salvaguardar dados enquanto optimiza a utiliza\u00e7\u00e3o do armazenamento. Este artigo decomp\u00f5e o que \u00e9 a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o, como funciona e quando utiliz\u00e1-la em vez da replica\u00e7\u00e3o tradicional.    <\/em><br\/><\/p>\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Replica\u00e7\u00e3o vs. Codifica\u00e7\u00e3o de elimina\u00e7\u00e3o: qual \u00e9 a diferen\u00e7a?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\" style=\"font-size:18px\">Por predefini\u00e7\u00e3o, muitos sistemas de armazenamento, <a href=\"https:\/\/www.sardinasystems.com\/pt-pt\/fishos\/ceph-storage\/\" target=\"_blank\" rel=\"noopener\" title=\"\">incluindo o Ceph<\/a>, utilizam replica\u00e7\u00e3o para proteger dados. <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">A replica\u00e7\u00e3o \u00e9 simples:<\/mark> cada fragmento de dados \u00e9 duplicado em m\u00faltiplos discos (frequentemente 3 c\u00f3pias). Este m\u00e9todo \u00e9 r\u00e1pido e fi\u00e1vel, especialmente para ficheiros pequenos ou ambientes de alto desempenho\u2014<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-red-color\">mas consome uma grande quantidade de armazenamento.<\/mark> <\/p>\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">A codifica\u00e7\u00e3o de elimina\u00e7\u00e3o,<\/mark> por outro lado, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">adopta uma abordagem mais eficiente.<\/mark> Em vez de copiar conjuntos de dados inteiros, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-red-color\">divide-os em fragmentos menores<\/mark>\u2014uma combina\u00e7\u00e3o de fragmentos de dados e fragmentos de paridade (utilizados para recupera\u00e7\u00e3o). Estes fragmentos s\u00e3o distribu\u00eddos por diferentes discos. Se alguns discos falharem, os dados em falta podem ser reconstru\u00eddos utilizando a informa\u00e7\u00e3o de paridade.<br\/>A tabela abaixo compara a replica\u00e7\u00e3o e a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o em termos de efici\u00eancia de armazenamento, m\u00e9todo de recupera\u00e7\u00e3o e casos de utiliza\u00e7\u00e3o ideais:  <br\/><\/p>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Replication-vs.-Erasure-Coding-scaled.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Replication-vs.-Erasure-Coding-1024x576.png\" alt=\"Compara&#xE7;&#xE3;o de Armazenamento entre Replica&#xE7;&#xE3;o e Codifica&#xE7;&#xE3;o de elimina&#xE7;&#xE3;o\" class=\"wp-image-75430\" srcset=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Replication-vs.-Erasure-Coding-1024x576.png 1024w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Replication-vs.-Erasure-Coding-300x169.png 300w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Replication-vs.-Erasure-Coding-768x432.png 768w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Replication-vs.-Erasure-Coding-1536x864.png 1536w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Replication-vs.-Erasure-Coding-1390x782.png 1390w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Replication-vs.-Erasure-Coding-1920x1080.png 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><br\/><strong>Como funciona a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o no Ceph<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">A codifica\u00e7\u00e3o de elimina\u00e7\u00e3o no Ceph \u00e9 configur\u00e1vel atrav\u00e9s de perfis que <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">definem como os dados s\u00e3o divididos e protegidos.<\/mark> Cada perfil CE \u00e9 definido por dois par\u00e2metros:<br\/>\u2022 k \u2013 N\u00famero de fragmentos de dados<br\/>\u2022 m \u2013 N\u00famero de fragmentos de codifica\u00e7\u00e3o (paridade)<\/p>\n\n<p class=\"wp-block-paragraph\">O sistema cria um total de k + m fragmentos, que s\u00e3o distribu\u00eddos pelo cluster de armazenamento. O Ceph pode tolerar at\u00e9 m falhas sem perda de dados.<br\/>A tabela abaixo descreve os perfis de codifica\u00e7\u00e3o de elimina\u00e7\u00e3o mais comumente utilizados e compara-os em termos de toler\u00e2ncia a falhas e sobrecarga de armazenamento: <\/p>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/EC-Coding-profiles-scaled.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/EC-Coding-profiles-1024x576.png\" alt=\"Perfis de codifica&#xE7;&#xE3;o de elimina&#xE7;&#xE3;o mais comuns para armazenamento\" class=\"wp-image-75439\" srcset=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/EC-Coding-profiles-1024x576.png 1024w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/EC-Coding-profiles-300x169.png 300w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/EC-Coding-profiles-768x432.png 768w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/EC-Coding-profiles-1536x864.png 1536w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/EC-Coding-profiles-1390x782.png 1390w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/EC-Coding-profiles-1920x1080.png 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><em>Exemplo: Um perfil 3+2 divide os dados em 3 fragmentos e adiciona 2 fragmentos de paridade. Quaisquer 3 de 5 fragmentos podem restaurar os dados originais, mesmo se 2 fragmentos forem perdidos. <\/em><\/p>\n<\/blockquote>\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Escolher o perfil CE adequado<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">A escolha depende do seu ambiente e objectivos:<br\/><strong>\u2022 k mais baixo, m mais alto (por exemplo, 3+2):<\/strong> Mais redund\u00e2ncia, ideal para clusters menores ou onde a resili\u00eancia \u00e9 uma prioridade m\u00e1xima.<br\/><strong>\u2022 k mais alto, m mais baixo (por exemplo, 10+4):<\/strong> Melhor efici\u00eancia de armazenamento, \u00f3ptimo para implementa\u00e7\u00f5es em grande escala que priorizam a redu\u00e7\u00e3o de custos.<br\/><br\/>A codifica\u00e7\u00e3o de elimina\u00e7\u00e3o oferece v\u00e1rias vantagens que a tornam uma escolha poderosa para sistemas de armazenamento modernos, incluindo:<br\/><strong>\u2022 Armazenamento eficiente:<\/strong> Menor sobrecarga do que a replica\u00e7\u00e3o\u2014armazene mais dados no mesmo espa\u00e7o de disco.<br\/><strong>\u2022 Alta toler\u00e2ncia a falhas:<\/strong> Lida com m\u00faltiplas falhas de disco sem perda de dados.<br\/><strong>\u2022 Escalabilidade:<\/strong> Adequada para grandes clusters e implementa\u00e7\u00f5es em escala de nuvem.<br\/><strong>\u2022 Redund\u00e2ncia personalizada:<\/strong> Ajuste o r\u00e1cio k+m para atender \u00e0s suas necessidades de durabilidade e or\u00e7amento.<\/p>\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Quando a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o faz sentido<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">A codifica\u00e7\u00e3o de elimina\u00e7\u00e3o n\u00e3o \u00e9 ideal para todos os cen\u00e1rios. Mas quando aplicada estrategicamente, destaca-se em muitos casos. Aqui est\u00e3o os cen\u00e1rios onde a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o se destaca, juntamente com as raz\u00f5es pelas quais \u00e9 particularmente adequada para cada um:  <br\/><\/p>\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Comparison-of-Replication-vs.-Erasure-Coding-1024x571.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"571\" src=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Comparison-of-Replication-vs.-Erasure-Coding-1024x571.png\" alt=\"Compara&#xE7;&#xE3;o entre replica&#xE7;&#xF5;es e codifica&#xE7;&#xE3;o de elimina&#xE7;&#xE3;o no armazenamento\" class=\"wp-image-75450\" srcset=\"https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Comparison-of-Replication-vs.-Erasure-Coding-1024x571.png 1024w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Comparison-of-Replication-vs.-Erasure-Coding-300x167.png 300w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Comparison-of-Replication-vs.-Erasure-Coding-768x428.png 768w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Comparison-of-Replication-vs.-Erasure-Coding-1536x856.png 1536w, https:\/\/www.sardinasystems.com\/wp-content\/uploads\/2025\/06\/Comparison-of-Replication-vs.-Erasure-Coding.png 1615w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong><br\/><strong>Cen\u00e1rios mais adequados para replica\u00e7\u00e3o<\/strong><\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">A codifica\u00e7\u00e3o de elimina\u00e7\u00e3o requer mais CPU e I\/O durante escritas e reconstru\u00e7\u00f5es, pelo que pode n\u00e3o ser a melhor escolha para:<br\/>\u2022 Bases de dados ou VMs (por exemplo, Ceph RBD)<br\/>\u2022 Sistemas de ficheiros interactivos com ficheiros pequenos (por exemplo, CephFS)<br\/>\u2022 Cargas de trabalho de I\/O de baixa lat\u00eancia e alto rendimento<br\/>Nestes casos, a replica\u00e7\u00e3o oferece melhor desempenho apesar do seu custo de armazenamento mais elevado.<\/p>\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n<p class=\"wp-block-paragraph\">A codifica\u00e7\u00e3o de elimina\u00e7\u00e3o \u00e9 uma estrat\u00e9gia eficaz para as organiza\u00e7\u00f5es <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">que visam optimizar a efici\u00eancia, durabilidade e escalabilidade do armazenamento.<\/mark> No Ceph, reduz a sobrecarga de armazenamento ao fragmentar os dados em parcelas com paridade, permitindo a recupera\u00e7\u00e3o de falhas sem replica\u00e7\u00e3o total dos dados. Uma configura\u00e7\u00e3o como 6+3 pode tolerar at\u00e9 tr\u00eas falhas, <mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-1-color\">tornando-a adequada para armazenamento inactivo e dados de objectos em grande escala.<\/mark><br\/>Embora ofere\u00e7a significativas poupan\u00e7as de custos e resili\u00eancia, a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o introduz compromissos de desempenho, particularmente para escritas pequenas ou frequentes, e \u00e9 menos ideal para aplica\u00e7\u00f5es sens\u00edveis \u00e0 lat\u00eancia, como bases de dados. <\/p>\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Na era dos grandes dados, as empresas est\u00e3o a gerar mais informa\u00e7\u00e3o do que nunca. Contudo, n\u00e3o \u00e9 suficiente apenas armazenar dados\u2014estes devem ser armazenados de forma eficiente, fi\u00e1vel e econ\u00f3mica. \u00c9 aqui que a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o (CE) entra em jogo. Utilizada por sistemas de armazenamento distribu\u00eddo como o Ceph, a codifica\u00e7\u00e3o de elimina\u00e7\u00e3o [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":75466,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1257],"tags":[2985,3304,3306,1412,1413,1415],"class_list":["post-75487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-o-nosso-blog","tag-armazenamento-na-nuvem","tag-codificacao-de-eliminacao","tag-replicacao","tag-armazenamento","tag-cef-pt-pt","tag-fishosceph-pt-pt","grve-entry-item","grve-blog-item"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Descubra como funciona a Codifica\u00e7\u00e3o de Elimina\u00e7\u00e3o, quando \u00e9 a solu\u00e7\u00e3o de armazenamento ideal e como se compara \u00e0 abordagem de replica\u00e7\u00e3o 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